Drill holding and releasing device



1,439,654.. H. w. WATSON.

DRILL HOLDING AND RELEASING DEVICE.

FILED JAN- 25,1922- Dec. 19, 1922.

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WITNESSES INVENTOH 311W Watson, MQQWLKM 7 By A TTORNEYS grinding is made necessary.

Patented Dec. 19, 1922.

entree stares HARRY WASHINGTON VIAJESON, OF IVEEMPI-IIS, TENNESSEE.

DRILL HOLDING AND BELEASING DEVICE.

Application filed Januarv 26, 1922. Serial No. 531,988.

To all whom it may concern.

Be it known that I, HARRY W. llhrrson, a citizen of the United States, and a resident (it Memphis, in the county of Shelby and State of Tennessee. have invented certain new and useful Improvements in Drill Holding and Releasing Devices, oi which the following is a specification.

My present invention relates generally to drill holders, and more particularly to what are commonly known as drill sockets, hav ing tapering bores for the reception of the stenroif a drill, which are usually provided also with transverse slots providing for the use of a drift and hammer in releasing the drill from thesocket.

It is a well known tlact'that considerable time is wasted at the'present time in removing drills with a drift and hammer, occasioned by the fact that in many instances both thedrit't and hammer are not closely at hand, and it isalso well known that a great deal of loss is occasioned by injury to the drill or socket, occasioning trouble in the use of the taper.

It i's-also a well known fact that considerable lossis occasioned by the fact that whendrifted out of its socket, the drill quite frequently falls and is either broken or at least ln ured to the extent that rellt is the primary object of my invention to provide a drill holding and releasing device, through manual manipulation of which a drill may be readily" and easily released, as well as one wherein this release may be accomplished with one hand only,

leaving the other hand entirely free to grasp the drill itself and hold the same when released.

In the accompanying drawing which illustrates my present invention and forms a part of this specification,

Figure 1 is a' side view, partly broken away and in section, showing the drill socket with a drill therein ready for use,

Figure 2 is a side View, partly broken away and in section, of the drill socket, the view being taken at right angles with respect to Figure l, and

Figure 3 is a detail perspective view showing the drill engaging members and their support.

Referring now'to these figures my invention proposes a drill socket 10 having the usual lower cylindrical portion 11 bored on a taper'as atl corresponding to the taper of the stem or a drill 1% shown in Figure 1, and provided at the inner end of the lower cylindrical portion 11, with a transverse slot 15, through which in the sence of other parts the usual drift mi be hammered into engagen'ient with the inner tang 16 of the drill. stem for the purpose of dislodging the latter from the bore of the socket.

In accordance with my present invention however the external surface of the socket outer ends project through the slots 15 and I into the upper counterbore 19 of the sleeve 18, said counter-bore forming an annular shoulder 20 at its lower end within the sleeve adapted to engage the outwardly pro ecting ends of members 19.

My invent-ion also contemplates the use of a pivotal connection for the drill engaging and releasing members 19,-in the nature of a cross bar 21 which is extended through the slots 15 at the inner ends of the latter and is provided with a pair of rounded bearing'members 22 projecting therefrom upon opposite sides of the axis of t-llG'SOC-kGt, said bearing members beingextended into contormable grooves 23 of the members 19 and thus constituting fulcrums upon which the members 19 are adapted to move in per forming their functions as drill releasing dogs.

The cross bar 21 is prevented from rotation byvirtue of the extension of its ends into the slots 15 of the socket, andis conouter ends of the dogs 19 by virtue of its internal shoulder 20, will cause rocking of the dogs on their fulcrum bearings 22 so that the inner ends ot the dogs will be forced downwardly against the drill tang 16 in order to force the drill stem 13 downwardly to a suiiicient extent so thatthe latter may he detached and Withdrawn by hand.

It is still further obvious that in this op eration the sleeve lo' may he turned by one hand While the other hand is left free to grasp the drill ll and remove the latter without danger oi? falling and becoming marred or o erWise iniu For the purpose it preierahle in pra ce that the external surface of the be milled or therwise roughei d and it s probable that diametrically opposite openi 2%, or an ani i N Hill? ted in the external surface oi the sleeve for the introduction ot a pin or other inipleinent to assist in the rotation of the sleeve.

I claim l. A drill socket having a drill receiving bore and transverse slots at the inner end ot its bore, and external threads ad acentto said slots, a sleeve having internal threads engaging the threads oi? the socket and having a eounterbore at one end forming an mternal shoulder, a cross pin extendlng through the slotsol the socket with its ends projectinginto the counterbore oi the sleeve and held against lengthwise displacement by the latter, said -cross pin having rounded ing through the slots of the socket and en-' gageahle and shiltable by the inner annular shoulder of the sleeve.

2. A drill socket having a drill receiving bore and lengthwise slotted diametrically 013-,

series ot such openings may be pro-" posed openings at the inner end of the bore, a l ir of dogs lulcrunied intermediate their ends Within the here and having their outer ends projecting externally through said slotted openings, and means movable upon the external surlace of the socket for engagi the said outer ends of the dogs to actuate the latter, and a support for the tulcruins of said dogs in the nature of a cross pin also extending through the slotted openings of the socket.

A drill socket having drill receiving bore and lengthwise slotted diametrically oppos-al openings at the inner Elltllflli the bore, a pair of dogs tulcrijnned intermediate their ends Within the bore and having their outer ends projecting externally through said slotted openings, and meals movable upon the external surface of the socket for engaging the said outer ends of the dogs to actuate the latter, and a support for the tulcrunis of said dogs in the nature of a cross pin also extending through the slotted openings ol the socket, said dog actuating means being in the i'orni ot a sleeve, threaded upon the external surface or the socket and a portion oi? which houses the said cross pin to prevent lengthwise displacement or the latter and the said dogs. c

l. A drill socket having a bore and transversely disposed lengthwise slotted openings in opposed relation at the inner end of the bore, a supporting member extending through the slots at their-inner ends, a pair of dogs having hearings on the said support forming tulcruins for the dogs and normally extending at right angles to the longitudinal axis of the socket with their outer ends projecting through the said slots, and a member inovable upon the exterior otthe socket having means to engage I the outwardly projecting ends of the dogs for shitting the latter on their fulcrurns.

lrlARRY lVASHINGTON WAISON. 

